/**
 *   Licensed to the Apache Software Foundation (ASF) under one
 *   or more contributor license agreements.  See the NOTICE file
 *   distributed with this work for additional information
 *   regarding copyright ownership.  The ASF licenses this file
 *   to you under the Apache License, Version 2.0 (the
 *   "License"); you may not use this file except in compliance
 *   with the License.  You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *   See the License for the specific language governing permissions and
 *   limitations under the License.
 */
package com.qlangtech.tis.sql.parser.er;

import org.apache.commons.lang.StringUtils;

/**
 * @author 百岁（baisui@qlangtech.com）
 * @date 2020/04/13
 */
public enum TabCardinality {

    ONE_ONE("1:1"), ONE_N("1:n");

    /*一对多*/
    private final String token;

    private TabCardinality(String val) {
        this.token = val;
    }

    public String getToken() {
        return this.token;
    }

    public static TabCardinality parse(String token) {
        if (StringUtils.isEmpty(token)) {
            throw new IllegalArgumentException("token:" + token + " is illegal");
        }
        for (TabCardinality c : TabCardinality.values()) {
            if (c.token.equals(token)) {
                return c;
            }
        }
        throw new IllegalStateException("token:" + token + " is illegal");
    }
}
